Tilapia antifreeze should pay attention to insulation: 2. Smaller ponds or ponds used for parental and fingerling breeding can be covered in plastic pools. An aerator is placed in the pool. When the temperature in the greenhouse is too low, charcoal can be heated in the shed to increase the temperature. Conditions can be used in the bottom of the pond with hot water pipes to inject hot water or hot spring water, so that the formation of heat islands at the bottom of the pond, is conducive to fish overwintering. 3. For large-scale adult fish breeding ponds, the concentrated overwintering method can be adopted to separate the fish in the local waters and keep the fishes from gathering over winter. 4. Incubate the cage, and try to sink the cage as far as possible to keep the depth of water below 2 meters. When resuming production, the following points should be made: When the weather is improved, the ponds and ponds should be cleaned as soon as possible and disinfected with quicklime to remove excessive silt. After the temperature rises, first fill the water and put appropriate amount of mixed fishes such as oysters and clams. When releasing early seedlings, care should be taken to reduce the stocking density and feed high-quality compound feed to ensure that a certain amount of commercial fish is put on the market in the first half of the year; For ponds with less dead fish, due to long-term rainy weather and large amounts of groundwater for thermal insulation, they should pay close attention to changes in water quality, keep the water fresh, and find that the water quality is acidic, and use appropriate amount of quicklime to transfer water to the whole pool. , Adjust the acidity, dosage is 10 mg per liter; Strengthen daily management and patrol ponds, find diseased fish and dead fish in a timely manner to prevent the occurrence and rapid spread of hydromycosis caused by long-term low temperature frostbite, and can be treated with iodine preparations Slime caused by low temperatures. Insulation of shrimp should be covered with a transparent film greenhouse above the culture pond to increase the water temperature above 5°C. When the outdoor water temperature is 7°C~8°C, the water temperature in the greenhouse can be kept at 12°C~13°C; , Strengthen the pond dike, prevent leakage, avoid water exchange; where conditions permit, groundwater can be pumped to increase the temperature of the pool. Daily management should do the following: 1. In the greenhouse, air does not circulate, and shrimp density is high. Continuous low temperature and cloudy days result in poor propagation of planktonic microalgae, low dissolved oxygen, and easy deterioration of water quality. It is necessary to use photosynthetic bacteria, lactic acid bacteria and other beneficial bacteria that do not consume oxygen to purify water and reduce the water quality. Ammonia nitrogen, nitrite nitrogen, maintain a good water environment. 2. Keep the dissolved oxygen content of the water more than 5 milligrams per liter, use oxygenates as much as possible to increase dissolved oxygen, and use oxygen aerators with caution, so as not to stir the water body, lower the underlying water temperature, and promote prawn stress. 3. Use modifiers such as active calcium and zeolite powder to improve the quality of water. 4. Reduce the feeding of feed, oral administration of vitamin C, Chinese herbs, and immune polysaccharides to improve the anti-stress and disease resistance of shrimp. Sample Release Reagent Kit Of COVID-19 The Sample Release Reagent Kit is intended for the pre-treatment of the samples to be tested. The substances to be tested in the specimens can be released from other substances to facilitate the use of in vitro diagnostic reagents or instruments. DNA release reagent,RNA release reagent,viral release reagent,virus release reagent,sample release reagent kit Shenzhen Uni-medica Technology Co.,Ltd , https://www.unimed-global.com
1. Construct a wind shelter of 0.3m to 0.5m covered with nylon film or straw on the north side of the pond, blocking the north wind from blowing directly onto the surface of the pond and slowing down the alternation of pool water, thereby slowing down the pool water cooling.
Protein structure is rapidly destroyed by denaturation and biochemical reagents, releasing the nucleic acid.